What makes a web tool Web 2.0?

Example Web 2.0 Tools

Pick from one of the tools below (or choose your own) for our activity today
Glogster - group 11
Voicethread - group 2
Wallwisher or Linoit - group 7
Wordle or Tagxedo - group 6
Cover it Live - group[ 10
Toondoo - Group 1
Edublogs -
Wikispaces
Community Walk - group 9
Google Maps - group 4
Tiki-Toki Timeline or X-Timeline
bubbl.us mindmap - group 8
SpicyNodes - group 5
Storybird - group 3